Assessment of the effect of chitosan of different molecular weights in controlling Rhizopus rots in tomato fruits
Por:
Hernández-Lauzardo A.N., Guerra-Sánchez M.G., Hernández-Rodríguez A., Heydrich-Pérez M., Vega-Pérez J., Velázquez-del Valle M.G.
Publicada:
1 ene 2012
Categoría:
Agronomy and Crop Science
Resumen:
The effect of chitosan was evaluated in three isolates of Rhizopus stolonifer from infected tomatoes that were harvested in different regions of the state of Morelos, México. Changes in the membrane integrity of spores, modifications in pH media and the proteins released were analysed in each isolate against three different molecular weights of chitosan at three fixed concentrations. There was an observed decline in the integrity of spores in the presence of chitosan at all the concentrations evaluated. The protein released was different depending on the isolate, kind of chitosan and used concentration. There was a significant difference in the pH changes on the growth media for all the tested isolates. Chitosan of high molecular weight showed the best results to inhibit the infection caused by R. stolonifer on the tomato fruits. The severity of symptoms of soft rot was not related with the molecular weight of chitosan. © 2012 Copyright Taylor and Francis Group, LLC.
Filiaciones:
Hernández-Lauzardo A.N.:
Centro de Desarrollo de Productos Bióticos, Instituto Politécnico Nacional, Carretera Yautepec-Jojutla Km 8.5, San Isidro, Yautepec, Morelos, México CP 62731, Mexico
Guerra-Sánchez M.G.:
Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación Carpio, s/n Plutarco Elias Calles, Miguel Hidalgo, México D.F. CP 11340, Mexico
Hernández-Rodríguez A.:
Facultad de Biología, Universidad de la Habana, Calle 25 # 455. Plaza, Ciudad Habana, Cuba CP 10347, Cuba
Heydrich-Pérez M.:
Facultad de Biología, Universidad de la Habana, Calle 25 # 455. Plaza, Ciudad Habana, Cuba CP 10347, Cuba
Vega-Pérez J.:
Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación Carpio, s/n Plutarco Elias Calles, Miguel Hidalgo, México D.F. CP 11340, Mexico
Velázquez-del Valle M.G.:
Centro de Desarrollo de Productos Bióticos, Instituto Politécnico Nacional, Carretera Yautepec-Jojutla Km 8.5, San Isidro, Yautepec, Morelos, México CP 62731, Mexico
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